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Maryland Estates and Trusts Section 5-303
§ 5-303.
  The register shall assume due execution of the will:
    (1)   If the will appears to have been duly executed and contains a recital by attesting witnesses of facts constituting due execution; or
    (2)   If it does not so appear, or if the will does not contain that recital, then upon the verified statement of a person with personal knowledge of the circumstances of execution whether or not the person was in fact an attesting witness.